Horse whinny or lion roar: which iconic sound is more complex?

A new study (ScienceDaily, August 26, 2026) reveals that when a horse whinnies, it actually produces two completely different sounds at the same time! This dual-frequency vocalization is a surprising evolutionary adaptation. How does it compare to the raw power of a lion's roar? Which animal sound impresses you more? Source: ScienceDaily. Original editorial visuals.